Trait AltStringData 

pub trait AltStringData: AltrepLen {
    // Required method
    fn elt(&self, i: usize) -> Option<&str>;

    // Provided methods
    fn is_sorted(&self) -> Option<Sortedness> { ... }
    fn no_na(&self) -> Option<bool> { ... }
}

Trait for types that can back an ALTSTRING vector.

Note: elt returns a &str which will be converted to CHARSXP.

Required Methods

fn elt(&self, i: usize) -> Option<&str>

Get the string element at index i.

Return None for NA values.

Provided Methods

fn is_sorted(&self) -> Option<Sortedness>

Optional: sortedness hint.

fn no_na(&self) -> Option<bool>

Optional: does this vector contain any NA values?

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl AltStringData for &[&str]

fn elt(&self, i: usize) -> Option<&str>

impl AltStringData for &[String]

fn elt(&self, i: usize) -> Option<&str>

impl AltStringData for Box<[String]>

fn elt(&self, i: usize) -> Option<&str>

fn no_na(&self) -> Option<bool>

impl AltStringData for Vec<Cow<'static, str>>

fn elt(&self, i: usize) -> Option<&str>

fn no_na(&self) -> Option<bool>

impl AltStringData for Vec<Option<Cow<'static, str>>>

fn elt(&self, i: usize) -> Option<&str>

fn no_na(&self) -> Option<bool>

impl AltStringData for Vec<Option<String>>

fn elt(&self, i: usize) -> Option<&str>

fn no_na(&self) -> Option<bool>

impl AltStringData for Vec<String>

fn elt(&self, i: usize) -> Option<&str>

fn no_na(&self) -> Option<bool>

impl<const N: usize> AltStringData for [String; N]

fn elt(&self, i: usize) -> Option<&str>

Implementors

impl<I> AltStringData for IterStringData<I>

where I: Iterator<Item = String>,